Dell VxRail Network Planning Guide

Reserve network settings for VMware vSAN witness networks

The VMware vSAN witness networks can be VxRail-managed or customer-managed.

• For a VxRail stretched cluster, a customer-managed VMware vSAN witness is the only option. Configuring connectivity between the VxRail cluster networks and the VMware vSAN witness networks occurs after VxRail Manager completes the initial build of the cluster at the primary site.
• For a VxRail 2-node cluster, the VMware vSAN witness can be either:
  • VxRail-managed VMware vSAN witness where VxRail Manager configures the vSAN witness with the network settings that are provided during the initial build process.
  • Customer-managed VMware vSAN witness where VxRail Manager validates network connectivity as part of the validation process. Validation must pass before continuing to the initial build phase.

Record the two IP addresses for the VMware vSAN witness virtual appliance. The witness management network and the witness VMware vSAN network cannot share the same subnet.

Decide whether to use the VMware vSAN network or the witness traffic separation (WTS) network for monitoring.

• For a VxRail 2-node cluster, the WTS network is required.
• For a VxRail stretched cluster, a WTS network is recommended, but not required.

For a 2-node cluster deployment, record the IP addresses for each node that is required for vSAN witness traffic.